<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        img{
            width: 200px;
            height: 200px;
        }
        .active{
            color: red;
        }
    </style>
</head>
<body>
    <div id="app">  </div>
    <template id="my-app">
        <!-- <div :class="className">子进</div>
        <div :class="{'active':isActive}">菌菌</div>
        <button @click="change">切换</button> -->

        <!-- <div :class="{'active':isActive,title:'true'}">但总</div>
        <div class="lang" :class="className">浪哥</div>
        <div class="baobao" :class="classObj">旭旭宝宝</div> -->
        <!-- <div class="baby" :class="getClass()">阳阳宝贝</div> -->
        
        <div :class="['feng','baby',className]">冯总</div>
        <div :class="['wang',isActive ? 'active' : '']">老王</div>
        <div :class="['hengheng',{'active':isActive}]">恒恒</div>
    </template>

    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
    <script>
        const App = {
            template:'#my-app',
            data(){
                return {
                    className:'username',
                    isActive:true,
                    classObj:{
                        active:true,
                        title:true
                    },

                }
            },
            methods:{
                change(){
                    this.isActive = !this.isActive
                },
                getClass(){
                    return 'yangyang'
                }
            }
        }
        Vue.createApp(App).mount('#app')
    </script>
</body>
</html>